| Three-dimensional numerical study of the acoustic properities of a highly underexpanded jet | |
Wu K(吴坤) ; Li XP(李晓鹏); Yao W(姚卫); Fan XJ(范学军)
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| Source Publication | 20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2015 |
| 2015 | |
| Conference Name | 20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2015 |
| Conference Date | July 6, 2015 - July 9, 2015 |
| Conference Place | Glasgow, United kingdom |
| Abstract | The goal of this paper is to advance the simulation of the acoustic field of highly underexpanded jets and to gain a deeper physical understanding of the noise generation mechanism. Large eddy simulation of an underexpanded jet with NPR of 5.60 is implemented with one-equation model for sub-grid scale (SGS) kinetic energy. The predicted time-averaged results agree well with the literature data and theoretical model, especially for the height and diameter of Mach disk. The generation and transport mechanism of sound source are discussed based on high temporal-resolution instantaneous flow fields. Furthermore, the dual-source pattern of the jet noise field is revealed by frequency spectrum analysis. © 2015, AIAA American Institute of Aeronautics and Astronautics. All rights reserved. |
| Keyword | Frequency Spectrum Analysis High Temporal Resolution Instantaneous Flow Noise Generation Mechanisms Theoretical Modeling Three Dimensional Numerical Studies Transport Mechanism Under Expanded Jets |
| Department | LHD超声速燃烧 |
| ISBN | 9781624103209 |
| URL | 查看原文 |
| Indexed By | EI |
| Language | 英语 |
| Document Type | 会议论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/60164 |
| Collection | 高温气体动力学国家重点实验室 |
| Recommended Citation GB/T 7714 | Wu K,Li XP,Yao W,et al. Three-dimensional numerical study of the acoustic properities of a highly underexpanded jet[C]20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2015,2015. |
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| File Name/Size | DocType | Version | Access | License | ||
| Cp2016-049.pdf（590KB） | 会议论文 | 开放获取 | CC BY-NC-SA | View Download | ||
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